- Compliance with DIN ISO 835 standard with color coded.
- Class ‘A’ with Certificate.
- Printed in Amber/Blue color.
- Pipette are graduated to deliver from any graduation line ↓ to 0 at the jet, with the last drop blowout.
- Color coded for each capacity making it easier to recognize
OVERVIEW :
The GWSI 5 ml Class A serological pipette is a certified blue-band pipette for 0.05 ml steps with a file behind it. Premium borosilicate 3.3 glass gives high thermal shock resistance, hydrolytic resistance, and chemical inertness in a 5 ml stem. DIN ISO 835 / ASTM E1044 Class A tolerance is ±0.030 ml — tighter than the Class B glassware ±0.050 ml table. Calibrated to deliver (TD) at 20 °C; blow out the last drop. Certificate in the box; NABL gravimetric calibration on request. This is Class A volumetric glassware in serological form. Interchangeable ground joints stay on flasks.
HISTORY :
Five millilitres is the take most assay methods actually write down. Class B 5 ml serologicals were fine for culture. QC then needed the same blow-out geometry at Class A error, with a serial and a certificate an auditor could pull. GWSI Glass Lab still draws, marks, and certifies that 5 ml pipette in Ambala as autoclavable lab glass.
APPLICATIONS :
– Pharmaceutical labs: 5 ml QC aliquots and method takes that must sit in the GMP file
– Biotech: certified media and buffer steps at 0.05 ml resolution
– Industrial laboratories: incoming and in-process checks with a lot or piece certificate
– Research labs: quantitative 5 ml work that still needs the last drop
– Schools, colleges, universities & educational institutes: advanced analytical practicals
– Hospital and diagnostic benches: accredited 5 ml diagnostic dilutions
MANUFACTURING PROCESS :
GWSI melts high-purity borosilicate 3.3 and draws a 5 ml tube, jet timed to the Class A delivery window. The blank anneals in the lehr, then the 0.05 ml scale, blow-out rings, blue code, and serial go on. Only pieces that will weigh inside ±0.030 ml get a certificate number.
TESTING PROCESS :
First check is manual: jet, 0.05 ml spacing, rings, blue band, and serial. A polarization stress test on the polariscope follows. Delivery is then weighed to I.S.O. DIN (ISO 835 Class A) / ASTM E1044 — TD at 20 °C, last drop blown out, ±0.030 ml. NABL gravimetric calibration writes the certificate — batch or individual — that ships with the pipette.
PRINTING PROCESS :
The 0.05 ml scale, Class A / TD / 20 °C, serial, blue code, and GWSI name are precision screened with glass enamels (ceramic inks). Kiln heat drives ceramic glass fusing, so the scale and serial stay as readable as the paper in the sleeve.
PACKAGING PROCESS :
Cosmetic sorting pulls seeds, slow jets, and any piece outside Class A. Pass pipettes pack in heavy-duty double-wall boxes with shock-absorbing bubble wrap, tip guards, and the printed certificate, for export from the Science City.
MAINTENANCE & SAFETY :
– Never mouth-pipette — use a filler
– Match serial on the stem to the certificate before first use
– Blow out the last drop; Class A serological is still blow-out
– Read at eye level; interval is 0.05 ml; work near 20 °C
– Do not mix uncertified Class B 5 ml pipettes into a qualified set
– Recalibrate on your NABL / SOP interval, or after a drop
– Wash in a pipette washer; keep grit out of the jet
– Autoclave this autoclavable lab glass at 121 °C only if the SOP allows; recheck volume after heat
– Store in a rack, blue band and serial visible, tips guarded
– Retire any pipette with a chipped jet, worn serial, or expired Cal